Well, if they're my friend, then I have no problem with how many friends they have. With the following conditions:
1) If they have a Facebook picture of them in a bikini or nakedness, and have 90% Facebook friends, I'm judging.
2) If I see her stringing them along, I'm judging. Excessive flirting, asking for excessive favours, etc.
But if it's simply "prefers hanging with men than woman", then I don't care either way. It's when men are getting strung along in the hopes of having sex with them. It must be said that if the girl is hot, the chances are the men want to sleep with her. Is it her fault? Not if she doesn't mean to.
That said, if I was trying to go out with said girl? Suddenly, it does matter. If she does flirt with her friends, or spends way too much time hanging out with some guys, or simply has a guy friend she is VERY close to, I probably would simply avoid trying to get with her. The odds are, he wants to sleep with her, and they're emotionally invested in each other, and in regards to him, I wouldn't be allowed an opinion "because I'm jealous".
Shallow and unfair? Probably. But that's my gut feeling.